chore(dependabot): setting dependabot to always increase versions

Dependabot by default will widen versions for libraries but this can
be a bit confusing as the package.json isn't changed.

Closes react-financial#28

.dependabot/config.yml

@@ -9,3 +9,4 @@ update_configs:
     commit_message:
       prefix: "chore"
       include_scope: true
+    version_requirement_updates: "increase_versions"